![Halle, Germany. 17th June, 2019. Tennis: ATP-Tour singles, men, 1st round, Haase (Netherlands) - Zverev (Germany). Spectators sit on the grandstand of the stadium, which can open and close its roof. Credit: Halle, Germany. 17th June, 2019. Tennis: ATP-Tour singles, men, 1st round, Haase (Netherlands) - Zverev (Germany). Spectators sit on the grandstand of the stadium, which can open and close its roof. Credit:](https://c8.alamy.com/comp/TWH8TP/halle-germany-17th-june-2019-tennis-atp-tour-singles-men-1st-round-haase-netherlands-zverev-germany-spectators-sit-on-the-grandstand-of-the-stadium-which-can-open-and-close-its-roof-credit-friso-gentschdpaalamy-live-news-TWH8TP.jpg)
Halle, Germany. 17th June, 2019. Tennis: ATP-Tour singles, men, 1st round, Haase (Netherlands) - Zverev (Germany). Spectators sit on the grandstand of the stadium, which can open and close its roof. Credit:
![Halle, Germany. 20th June, 2019. Tennis: ATP-Tour singles, men, round of 16, Johnson (USA) - Zverev (Germany). Alexander Zverev beats a forehand. Credit: Friso Gentsch/dpa/Alamy Live News Stock Photo - Alamy Halle, Germany. 20th June, 2019. Tennis: ATP-Tour singles, men, round of 16, Johnson (USA) - Zverev (Germany). Alexander Zverev beats a forehand. Credit: Friso Gentsch/dpa/Alamy Live News Stock Photo - Alamy](https://c8.alamy.com/comp/TWGH34/halle-germany-20th-june-2019-tennis-atp-tour-singles-men-round-of-16-johnson-usa-zverev-germany-alexander-zverev-beats-a-forehand-credit-friso-gentschdpaalamy-live-news-TWGH34.jpg)
Halle, Germany. 20th June, 2019. Tennis: ATP-Tour singles, men, round of 16, Johnson (USA) - Zverev (Germany). Alexander Zverev beats a forehand. Credit: Friso Gentsch/dpa/Alamy Live News Stock Photo - Alamy
![Halle. 22nd June, 2019. Roger Federer of Switzerland hits a return during the Gerry Weber Tennis Open men's singles semi final match between Roger Federer of Switzerland and Pierre-Hugues Herbert of France Halle. 22nd June, 2019. Roger Federer of Switzerland hits a return during the Gerry Weber Tennis Open men's singles semi final match between Roger Federer of Switzerland and Pierre-Hugues Herbert of France](https://c8.alamy.com/comp/TWRNHR/halle-22nd-june-2019-roger-federer-of-switzerland-hits-a-return-during-the-gerry-weber-tennis-open-mens-singles-semi-final-match-between-roger-federer-of-switzerland-and-pierre-hugues-herbert-of-france-on-june-22-2019-in-halle-germany-roger-federer-won-2-0-credit-joachim-bywaletzxinhuaalamy-live-news-TWRNHR.jpg)
Halle. 22nd June, 2019. Roger Federer of Switzerland hits a return during the Gerry Weber Tennis Open men's singles semi final match between Roger Federer of Switzerland and Pierre-Hugues Herbert of France
![Halle, Germany. 19th June, 2019. Tennis: ATP Tour Individual, Men, Round of 16, Stachowski (Ukraine) - Herbert (France). Sergei Stachowski's watching it, Ball. Credit: Friso Gentsch/dpa/Alamy Live News Stock Photo - Alamy Halle, Germany. 19th June, 2019. Tennis: ATP Tour Individual, Men, Round of 16, Stachowski (Ukraine) - Herbert (France). Sergei Stachowski's watching it, Ball. Credit: Friso Gentsch/dpa/Alamy Live News Stock Photo - Alamy](https://c8.alamy.com/comp/TDWH67/halle-germany-19th-june-2019-tennis-atp-tour-individual-men-round-of-16-stachowski-ukraine-herbert-france-sergei-stachowskis-watching-it-ball-credit-friso-gentschdpaalamy-live-news-TDWH67.jpg)